Light wavelength conversion module, illumination system, and projection apparatus

Abstract

A light wavelength conversion module including a substrate, a first light wavelength conversion layer, and a first light transmissive layer is provided. The substrate has a light passing-through area and a first light wavelength conversion area. The first light wavelength conversion layer is located at the first light wavelength conversion area and between the first light transmissive layer and the substrate. The first light wavelength conversion layer is suitable for converting a coherent light beam into a first conversion light beam, wherein wavelengths of the coherent light beam and the first conversion light beam are different from each other. An illumination system and a projection apparatus are also provided.

What is claimed is: 
     
       1. A light wavelength conversion module, comprising:
 a substrate, having a light passing-through area and a first light wavelength conversion area located at a side of the light passing-through area; 
 a first light wavelength conversion layer, located at the first light wavelength conversion area, suitable for converting a coherent light beam into a first conversion light beam, wherein wavelengths of the coherent light beam and the first conversion light beam are different from each other; and 
 a first light transmissive layer, wherein the first light wavelength conversion layer is located between the first light transmissive layer and the substrate, and the first light transmissive layer is capable of being passed through by the coherent light beam and the first conversion light beam. 
 
     
     
       2. The light wavelength conversion module as claimed in  claim 1 , further comprising:
 a second light wavelength conversion layer, located at the first light wavelength conversion area, overlapped the first light wavelength conversion layer, wherein the second light wavelength conversion layer and the first light wavelength conversion layer are located at the same side of the substrate, and the first light wavelength conversion layer and the second light wavelength conversion layer are located between the first light transmissive layer and the substrate, the second light wavelength conversion layer is suitable for converting the coherent light beam into a second conversion light beam, and wavelengths of the coherent light beam, the first conversion light beam, and the second conversion light beam are different from each other. 
 
     
     
       3. The light wavelength conversion module as claimed in  claim 2 , wherein the first light wavelength conversion layer is located between the second light wavelength conversion layer and the substrate. 
     
     
       4. The light wavelength conversion module as claimed in  claim 2 , further comprising:
 a second light transmissive layer, wherein the first light wavelength conversion layer is located between the second light transmissive layer and the substrate. 
 
     
     
       5. The light wavelength conversion module as claimed in  claim 2 , wherein a thickness of the second light wavelength conversion layer is less than a thickness of the first light wavelength conversion layer. 
     
     
       6. The light wavelength conversion module as claimed in  claim 2 , wherein an emission spectrum of the first light wavelength conversion layer partially overlaps an emission spectrum of the second light wavelength conversion layer. 
     
     
       7. The light wavelength conversion module as claimed in  claim 2 , wherein material of the first light wavelength conversion layer and the second light wavelength conversion layer is one of silicate fluorescent material, nitrogen oxides fluorescent material, yttrium aluminium garnet fluorescent material, nitrides fluorescent material, and sulfides fluorescent material, or any combination thereof. 
     
     
       8. The light wavelength conversion module as claimed in  claim 2 , wherein the substrate further comprises a second light wavelength conversion area, and the light wavelength conversion module further comprises a third light wavelength conversion layer, located at the second light wavelength conversion area, and the first light transmissive layer is further located on the third light wavelength conversion layer, wherein the third light wavelength conversion layer is suitable for converting the coherent light beam into a third conversion light beam, and wavelengths of the coherent light beam, the first conversion light beam, the second conversion light beam, and the third conversion light beam are different from each other. 
     
     
       9. The light wavelength conversion module as claimed in  claim 8 , further comprising:
 a fourth light wavelength conversion layer, located at the second light wavelength conversion area, overlapped the third light wavelength conversion layer, wherein the fourth light wavelength conversion layer and the third light wavelength conversion layer are located at the same side of the substrate, and the third light wavelength conversion layer and the fourth light wavelength conversion layer are located between the first light transmissive layer and the substrate. 
 
     
     
       10. The light wavelength conversion module as claimed in  claim 9 , wherein an emission spectrum of the fourth light wavelength conversion layer overlaps an emission spectrum of the third light wavelength conversion layer, the fourth light wavelength conversion layer is suitable for converting the third conversion light beam into a fourth conversion light beam, and wavelengths of the coherent light beam, the first conversion light beam, the second conversion light beam, the third conversion light beam, and the fourth conversion light beam are different from each other. 
     
     
       11. The light wavelength conversion module as claimed in  claim 9 , wherein the third light wavelength conversion layer is located between the fourth light wavelength conversion layer and the substrate, and the fourth light wavelength conversion layer is located between the first light transmissive layer and the third light wavelength conversion layer. 
     
     
       12. The light wavelength conversion module as claimed in  claim 11 , further comprising:
 a second light transmissive layer, wherein the third light wavelength conversion layer is located between the second light transmissive layer and the substrate. 
 
     
     
       13. The light wavelength conversion module as claimed in  claim 8 , wherein the substrate further comprises a third light wavelength conversion area, and the first light wavelength conversion layer is further located at the third light wavelength conversion area. 
     
     
       14. An illumination system, comprising:
 a coherent light source, suitable for emitting a coherent light beam; and 
 a light wavelength conversion module, disposed on a transmission path of the coherent light beam, and the light wavelength conversion module comprising:
 a substrate, having a light passing-through area and a first light wavelength conversion area located at a side of the light passing-through area; 
 a first light wavelength conversion layer, located at the first light wavelength conversion area; and 
 a first light transmissive layer, wherein the first light wavelength conversion layer is located between the first light transmissive layer and the substrate, the light passing-through area and the first light wavelength conversion area alternately cut into the transmission path of the coherent light beam, the coherent light beam irradiates the light passing-through area, the coherent light beam passes through the light passing-through area, the coherent light beam irradiates the first light wavelength conversion area, and the first light wavelength conversion layer converts the coherent light beam into a first conversion light beam, wherein wavelengths of the coherent light beam and the first conversion light beam are different from each other, and the first light transmissive layer is capable of being passed through by the coherent light beam and the first conversion light beam. 
 
 
     
     
       15. The illumination system as claimed in  claim 14 , wherein the light wavelength conversion module further comprises a second light wavelength conversion layer, located at the first light wavelength conversion area, overlapped the first light wavelength conversion layer, wherein the second light wavelength conversion layer and the first light wavelength conversion layer are located at the same side of the substrate, and the first light wavelength conversion layer and the second light wavelength conversion layer are located between the first light transmissive layer and the substrate, when the coherent light beam irradiates the first light wavelength conversion area, the first light wavelength conversion layer converts the coherent light beam into the first conversion light beam, and the second light wavelength conversion layer converts the coherent light beam into a second conversion light beam, wavelengths of the coherent light beam, the first conversion light beam, and the second conversion light beam are different from each other. 
     
     
       16. The illumination system as claimed in  claim 14 , wherein the substrate is a reflective substrate, the substrate comprises an opening, and the opening is located at the light passing-through area. 
     
     
       17. The illumination system as claimed in  claim 15 , wherein the substrate is a transparent substrate, and the light wavelength conversion module further comprises a reflective element located at the first light wavelength conversion area, and the reflective element is located between the first light wavelength conversion layer and the substrate and between the second light wavelength conversion layer and the substrate. 
     
     
       18. The illumination system as claimed in  claim 15 , further comprising:
 a beam combiner, disposed on the transmission path of the coherent light beam from the coherent light source, and located between the coherent light source and the light wavelength conversion module, wherein the beam combiner combines the coherent light beam passing through the light passing-through area and the first conversion light beam and the second conversion light beam from the first light wavelength conversion area. 
 
     
     
       19. The illumination system as claimed in  claim 18 , further comprising:
 reflecting mirrors, wherein the coherent light beam passing through the light passing-through area is sequentially reflected by the reflecting mirrors and transmitted to the beam combiner. 
 
     
     
       20. The illumination system as claimed in  claim 19 , further comprising:
 a color wheel, disposed on the transmission path of the coherent light beam, the first conversion light beam, and the second conversion light beam from the beam combiner, wherein the color wheel comprises a first light transmissive area and a first light filter area located at a side of the first light transmissive area, a diffusion film is disposed at the first light transmissive area, and a first color light filter layer is disposed at the first light filter area, wherein the first light transmissive area corresponds to the light passing-through area and cuts into the transmission path of the coherent light beam passing through the light passing-through area, the coherent light beam passes through the diffusion film, the first light filter area corresponds to the first light wavelength conversion area and cuts into the transmission path of the first conversion light beam and the second conversion light beam, and the first color light filter layer converts the first conversion light beam and the second conversion light beam into a first light beam. 
 
     
     
       21. The illumination system as claimed in  claim 20 , further comprising:
 a light uniforming element, disposed on the transmission path of the coherent light beam and the first light beam from the color wheel. 
 
     
     
       22. The illumination system as claimed in  claim 20 , wherein the substrate further comprises a second light wavelength conversion area, and the light wavelength conversion module further comprises a third light wavelength conversion layer, located at the second light wavelength conversion area, and the first light transmissive layer is further located on the third light wavelength conversion layer, wherein the third light wavelength conversion layer is suitable for converting the coherent light beam into a third conversion light beam, wavelengths of the coherent light beam, the first conversion light beam, the second conversion light beam, and the third conversion light beam are different from each other, and wherein the color wheel further comprises a second light filter area located next to the first light filter area, a second color light filter layer is located at the second light filter area, the second light filter area corresponds to the second light wavelength conversion area and cuts into a transmission path of the third conversion light beam, and the second color light filter layer converts the third conversion light beam into a second light beam. 
     
     
       23. The illumination system as claimed in  claim 22 , wherein the substrate further comprises a third light wavelength conversion area, the first light wavelength conversion layer is further located at the third light wavelength conversion area, the first light transmissive layer is further located on the first light wavelength conversion layer at the third light wavelength conversion area, and the color wheel further comprises a second light transmissive area, wherein the second light transmissive area corresponds to the third light wavelength conversion area and cuts into the transmission path of the first conversion light beam from the third light wavelength conversion area, to allow the first conversion light beam to pass through the second light transmissive area. 
     
     
       24. A projection apparatus, comprising:
 an illumination system, comprising:
 a coherent light source, suitable for emitting a coherent light beam; and 
 a light wavelength conversion module, disposed on a transmission path of the coherent light beam, and the light wavelength conversion module comprising:
 a substrate, having a light passing-through area and a first light wavelength conversion area located at a side of the light passing-through area; 
 a first light wavelength conversion layer, located at the first light wavelength conversion area; and 
 a first light transmissive layer, wherein the first light wavelength conversion layer s located between the first light transmissive layer and the substrate, the light passing-through area and the first light wavelength conversion area alternately cut into the transmission path of the coherent light beam, the coherent light beam irradiates the light passing-through area, the coherent light beam passes through the light passing-through area, when the coherent light beam irradiates the first light wavelength conversion area, the first light wavelength conversion layer converts the coherent light beam into a first conversion light beam, wherein wavelengths of the coherent light beam and the first conversion light beam are different from each other, and the first light transmissive layer is capable of being passed through by the coherent light beam and the first conversion light beam; 
 
 
 a light valve, disposed on a transmission path of an illumination beam from the illumination system, converting the illumination beam into an image beam, wherein the illumination beam is from the coherent light beam and the first conversion light beam; and 
 a projection lens, disposed on a transmission path of the image beam. 
 
     
     
       25. The projection apparatus as claimed in  claim 24 , wherein the light wavelength conversion module further comprises a second light wavelength conversion layer, located at the first light wavelength conversion area, overlapped the first light wavelength conversion layer, wherein the second light wavelength conversion layer and the first light wavelength conversion layer are located at the same side of the substrate, and the first light wavelength conversion layer and the second light wavelength conversion layer are located between the first light transmissive layer and the substrate, wherein when the coherent light beam irradiates the first light wavelength conversion area, the first light wavelength conversion layer converts the coherent light beam into the first conversion light beam, and the second light wavelength conversion layer converts the coherent light beam into a second conversion light beam, wavelengths of the coherent light beam, the first conversion light beam, and the second conversion light beam are different from each other, and the illumination beam is further from the second conversion light beam. 
     
     
       26. The projection apparatus as claimed in  claim 25 , wherein the illumination system further comprises a beam combiner, disposed on the transmission path of the coherent light beam from the coherent light source, and located between the coherent light source and the light wavelength conversion module, wherein the beam combiner combines the coherent light beam passing through the light passing-through area and the first conversion light beam and the second conversion light beam from the first light wavelength conversion area. 
     
     
       27. The projection apparatus as claimed in  claim 26 , wherein the illumination system further comprises a color wheel, disposed on the transmission path of the coherent light beam, the first conversion light beam, and the second conversion light beam from the beam combiner, wherein the color wheel comprises a first light transmissive area and a first light filter area located at a side of the first light transmissive area, a diffusion film is disposed at the first light transmissive area, and a first color light filter layer is disposed at the first light filter area, wherein the first light transmissive area corresponds to the light passing-through area and cuts into the transmission path of the coherent light beam passing through the light passing-through area, the coherent light beam passes through the diffusion film, the first light filter area corresponds to the first light wavelength conversion area and cuts into the transmission path of the first conversion light beam and the second conversion light beam, and the first color light filter layer converts the first conversion light beam and the second conversion light beam into a first light beam, wherein a spectrum of the first light beam is narrower than a spectrum of the first conversion light beam. 
     
     
       28. The projection apparatus as claimed in  claim 27 , further comprising:
 a light uniforming element, disposed on the transmission path of the coherent light beam and the first light beam from the color wheel. 
 
     
     
       29. The projection apparatus as claimed in  claim 27 , wherein the substrate further comprises a second light wavelength conversion area, and the light wavelength conversion module further comprises a third light wavelength conversion layer, located at the second light wavelength conversion area, and the first light transmissive layer is further located on the third light wavelength conversion layer, wherein the third light wavelength conversion layer is suitable for converting the coherent light beam into a third conversion light beam, wavelengths of the coherent light beam, the first conversion light beam, the second conversion light beam, and the third conversion light beam are different from each other, and wherein the color wheel further comprises a second light filter area located at a side of the first light filter area, a second color light filter layer is located at the second light filter area, the second light filter area corresponds to the second light wavelength conversion area and cuts into a transmission path of the third conversion light beam, the second color light filter layer converts the third conversion light beam into a second light beam, and the illumination beam is further from the third conversion light beam. 
     
     
       30. The projection apparatus as claimed in  claim 29 , wherein the substrate further comprises a third light wavelength conversion area, the first light wavelength conversion layer is further located at the third light wavelength conversion area, the first light transmissive layer is further located on the first light wavelength conversion layer at the third light wavelength conversion area, and the color wheel further comprises a second light transmissive area, wherein the second light transmissive area corresponds to the third light wavelength conversion area and cuts into the transmission path of the first conversion light beam from the third light wavelength conversion area, to allow the first conversion light beam to pass through the second light transmissive area.